From 9a362199f8c3cb90b1a042594c28df4874133037 Mon Sep 17 00:00:00 2001
From: braginini <bangvalo@gmail.com>
Date: Tue, 17 Aug 2021 18:05:51 +0200
Subject: [PATCH] fix: hotfix interface addr assignment

---
 iface/iface_linux.go | 21 ++++++++++++++-------
 1 file changed, 14 insertions(+), 7 deletions(-)

diff --git a/iface/iface_linux.go b/iface/iface_linux.go
index 86c670785b6..c9d9d4afe7a 100644
--- a/iface/iface_linux.go
+++ b/iface/iface_linux.go
@@ -37,13 +37,6 @@ func CreateWithKernel(iface string, address string) error {
 	}
 
 	log.Debugf("adding address %s to interface: %s", address, iface)
-	addr, _ := netlink.ParseAddr(address)
-	err = netlink.AddrAdd(&link, addr)
-	if os.IsExist(err) {
-		log.Infof("interface %s already has the address: %s", iface, address)
-	} else if err != nil {
-		return err
-	}
 	err = assignAddr(address, iface)
 	if err != nil {
 		return err
@@ -77,6 +70,20 @@ func assignAddr(address, name string) error {
 		attrs: &attrs,
 	}
 
+	//delete existing addresses
+	list, err := netlink.AddrList(&link, 0)
+	if err != nil {
+		return err
+	}
+	if len(list) > 0 {
+		for _, a := range list {
+			err = netlink.AddrDel(&link, &a)
+			if err != nil {
+				return err
+			}
+		}
+	}
+
 	log.Debugf("adding address %s to interface: %s", address, attrs.Name)
 	addr, _ := netlink.ParseAddr(address)
 	err = netlink.AddrAdd(&link, addr)